The Republican presidential hopeful accused his Democratic rival of a recent moment in which she was “totally out of control” while apparently speaking to a member of the American Federation of Labor-Congress of Industrial Organizations.

“I have much better judgment than she does. There’s no question about that. I also have a much better temperament than she has,” Trump said. “I think my strongest asset, maybe by far, is my temperament. I have a winning temperament. I know how to win. She does not.”

The real estate mogul then brought up an unknown incident with the AFL-CIO behind a “blue screen” in which he said Clinton lost her cool. “You were totally out of control!” Trump said. “I said, there’s a person with a temperament that’s got a problem.”

Clinton smiled throughout his comments. She then breathed a sigh of relief, saying “Woo! OK!” before shimmying her shoulders when it was her turn to respond. Her reaction garnered laughs and applause from the audience.